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🏠Home💠RC Main Discussion › What are the “8717 servos” of 2019?
09-11-2019 06:54 AM  11 months ago
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SoCal Scott

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Kailua, Hawaii

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What are the “8717 servos” of 2019?
I remember these were the hot cyclic servos to have for quite some time a while back. What are you guys flying nowadays that offer the speed/torque/hv capabilities of the trusty 8717s?
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09-11-2019 03:57 PM  11 months ago
Jeff polisena

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westpalmbeachflorida usa

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Expert servos are what I went to after 8717s.I stole it ,flew it and gave it back ;)
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09-11-2019 11:41 PM  11 months ago
Ace Dude

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USA

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I used 8717s back in the day and I'm now using Futaba BSL272SVs  
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09-13-2019 04:46 PM  11 months ago
wjvail

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Meridian, Mississippi

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SoCal Scott What are you guys flying nowadays that offer the speed/torque/hv capabilities of the trusty 8717s?
Servos have come a long way since the 8717. The higher spec HV 8717s were 230 in-oz, .06 second servos and came in at around $200. Those were killer specs for their time. Some would suggests it's all you need even today.
https://servodatabase.com/servo/jr/ds8717hv

Today $100, 1/2 the price, gets you a killer servo and nearly twice the torque + better speed.
http://www.promodeler.com/DS345BLHV

If you're insistent on spending $200 the list of choices is nearly endless. I own a lot of MKS X8 servos and like them but there are so many other good choices. I'm sure others will suggest servos that are working well for them.
"Well, nothing bad can happen now."
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09-13-2019 05:19 PM  11 months ago
DemetriusUSN

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Virginia Beach, Va USA

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You can’t beat
MKS X8-
Specifications
Torque:
6.0V: 430 oz-in (31 kg-cm)
7.4V: 541.6 oz-in (39 kg-cm)
8.2V: 569.38 oz-in (41 kg-cm)
Speed:
6.0V: 0.11 s
7.4V: 0.09 s
8.2V: 0.08 s

X5 servos
-X5 HBL550
Dimensions: 40x20x38.8mm
Weight: 79.5g
Torque/Speed:
29 kg-cm @ 4.8V (.117s @ 6.0V)
36 kg-cm @ 7.4V (.094s @ 7.4V)
38 kg-cm @ 8.2V (.085s @ 8.2V)
Minicopter Triabolo 700, Minicopter Diabolo 700, Minicopter Diabolo 600, Minicopter Diabolo 550, Goblin 770, HD 750, HD Cell 500
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09-26-2019 03:44 AM  10 months ago
Lwnemesis

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Seattle, WA

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There are a whole bunch of options starting at about $60 to over $250 per unit.

I like KST for budget options and Futaba BLS for high end. ProTek and Xpert servos are awesome too. DFA/JR has awesome servo options in their new 8915s. They even have 12v servos with insane torque, over 1000oz. Many choices.
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09-26-2019 09:09 PM  10 months ago
doorman

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Sherwood, Arkansas

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Servo Choices
I am liking the KST servo line..running in both pod and boom and scale..
Standard size BLS915 HV V2 from Heli Direct at 85 each.. worth a look.. smooth quite and strong..

Stan
AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft
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09-27-2019 03:47 AM  10 months ago
Ace Dude

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USA

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The new Futaba HPS-H700 and HPS-HC700 support a 760μs pulse width.

HPS-H700– S.Bus2 High-Voltage Standard Helicopter Servo:

High Performance Servo with Brushless Motor (Neutral Pulse Width: Default 1520μs, optional 760μs) (01102312-3)

FEATURES:
– Suitable for all purpose RC helicopters.
– Programmable/HV Brushless Servo.
– Custom New high power Brushless Motor.
– Programmable and compatible with S.Bus and S.Bus2 systems.
– Can be connected to a PC using the CIU-2/-3 USB adapter sold separately.
– Upper/middle/bottom: Aluminum Case
– 2S LiPo Suitable

SPEED:
0.075 sec/60°at 6.6V
0.07 sec/60° at 7.4V

TORQUE:
41.0 kgf/cm at 6.6V
569.4 ozf/in at 6.6V
44.0 kgf/cm at 7.4V
511.1 ozf/in at 7.4V

SIZE:
40.5 mm x 21 mm x 37.8 mm
1.59 in x 0.83 in x 1.49 in

WEIGHT:
76 g
2.68 oz

RATED VOLTAGE:
DC 6.0V-7.4V

OPERATING VOLTAGE:
DC 4.8-8.4V

-----------------------------------------------------------------

HPS-HC700– S.Bus2 High-Voltage Standard Helicopter Servo:

High Performance Servo with Brushless Motor (Neutral Pulse Width: Default 1520μs, optional 760μs) (01102305-3)

FEATURES:
– Suitable for all purpose RC helicopters.
– Programmable/HV Brushless Servo.
– Custom New high power Brushless Motor.
– Programmable and compatible with S.Bus and S.Bus2 systems.
– Can be connected to a PC using the CIU-2/-3 USB adapter sold separately.
– Upper/middle/bottom: Aluminum Case
– 2S LiPo Suitable

SPEED:
0.08 sec/60°at 6.6V
0.075 sec/60° at 7.4V

TORQUE:
18.0 kgf/cm at 6.6V
250.0 ozf/in at 6.6V
20.0 kgf/cm at 7.4V
277.8 ozf/in at 7.4V

SIZE:
40.5 mm x 21 mm x 37.8 mm
1.59 in x 0.83 in x 1.49 in

WEIGHT:
73 g
2.57 oz

RATED VOLTAGE:
DC 6.0V-7.4V

OPERATING VOLTAGE:
DC 4.8-8.4V

NO DRY BATTERY USE
  
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10-04-2019 02:48 PM  10 months ago
Ronald Thomas

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Gainesville, Fl, USA

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Expert KD-1s...Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!
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12-16-2019 11:38 AM  7 months ago
Richardmid1

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Leeds, England

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Futaba HPS-H700.60% of the time, it works every time!
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12-17-2019 05:56 AM  7 months ago
Chris.C

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Hong Kong

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I have these new JR servos in my SAB Urukay.
Here is the spec:
Speed:0.06 (6.6V)/0.06 (7.4V)/0.05 (8.4V) Sec/60°
Torque:34.2 (6.6V)/38.3 (7.4V)/43.5 (8.4V)kg・cm
474.7 (6.6V) / 532.2 (7.4V) / 604.1 (8.4V)oz・in
Full metal gears and casing,
Brushless motor.

http://www.rcdepot-jp.com/out_dep/s8955sh/
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12-17-2019 01:08 PM  7 months ago
wjvail

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Meridian, Mississippi

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Chris.C I have these new JR servos in my SAB Urukay.
Here is the spec:
Speed:0.06 (6.6V)/0.06 (7.4V)/0.05 (8.4V) Sec/60°
Torque:34.2 (6.6V)/38.3 (7.4V)/43.5 (8.4V)kg・cm
474.7 (6.6V) / 532.2 (7.4V) / 604.1 (8.4V)oz・in
Full metal gears and casing,
Brushless motor.

http://www.rcdepot-jp.com/out_dep/s8955sh/
Nice servos. How do you program them?
"Well, nothing bad can happen now."
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12-17-2019 01:57 PM  7 months ago
Richardmid1

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Leeds, England

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Great specs but sadly proper Japanese JR Propo servos are no more.60% of the time, it works every time!
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12-18-2019 12:23 AM  7 months ago
Ace Dude

rrProfessor

USA

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Xpert are also a good option:

https://www.xpert-rc-us.com/

HS-6402-HV KD1 Standard Size Full Aluminum Servo

Features

Developed and tuned by World Champion Helicopter Master, Kyle Dahl.
Global 3D 2017 Competition Winning Servo.
Ultra High Responsive cyclic algorithm software.
Quick release cable that allows easy and quick installation for all helicopters.
Brushless motor design provides extremely high speed, top efficiency, and low power consumption.
4096 resolution and SIC (Single Integrated Circuit) for the highest performance and durability.
All Aluminum case for the best thermal dissipation and durability.
Strong Metal Gear
Glitch-free
Sophisticated error correction
High-Speed, High-precision 12-bit AD converter and CPU calculation
Fail safe
Over current protection
Over temperature protection
Start sonorant
Operating frequency up to 400Hz

Type Standard
Product Name HS-6402-HV KD1 Standard Size Full Aluminum Servo
Part Name HS-6402-HV
Power Supply 6.0V~8.4V
Speed (sec/ 60°) @6.0V: .086 sec/60° @7.4V: .07 sec/60° @8.4V: .062 sec/60°
Torque (oz/in) @6.0V: 296.45 oz-in) @7.4V: 366.85 oz-in @8.4V: 416.40 oz-in
Torque (kg/cm) @6.0V: 21.43 kg-cm @7.4V: 26.43 kg-cm @8.4V: 30.00 kg-cm
Dimensions 40x37.80x20 mm
Weight 72g
Range up to 400Hz
Center Position 1520us
Applications Helicopter Cyclic
Gear Set P/N XGS7232S
  
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12-18-2019 01:48 AM  7 months ago
Chris.C

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Hong Kong

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wjvail Nice servos. How do you program them?
I did not explore the options with the servos as they are excellent as it is. If I do, I need to buy a servo programmer from them.
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12-18-2019 11:13 AM  7 months ago
Richardmid1

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Leeds, England

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Transit speed and torque are way overkill on all these servos these days so for me it would come down to reliability and reputation and as JR are no more my choice would be Futaba. Narrow pulse would make the biggest difference but I'm not sure it's widely supported in the FBL systems yet.60% of the time, it works every time!
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12-19-2019 04:38 PM  7 months ago
wjvail

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Meridian, Mississippi

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Richardmid1 Great specs but sadly proper Japanese JR Propo servos are no more.
Richardmid1 ...and as JR are no more...
Richard - you've said a couple of time that JR is no longer available but it appears they are. If JR isn't available, something "named" JR is. Some facsimile of JR can be bought right now. Chris.C posted a link. There appears to be a nice selection here -> https://www.deeforce.net/shop-3

Are you suggesting that the JR I see today is a "rebirth" or "rehash" of a now defunct name? Is it like Indian Motorcycles where I can buy an "Indian" today but the name has been through several incarnations and is now owned by Polaris and the only heritage with "Indian" is the name? https://www.polaris.com/en-us/
"Well, nothing bad can happen now."
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12-19-2019 05:13 PM  7 months ago
Lwnemesis

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Seattle, WA

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JR went bankrupt and was bought at a bankruptcy auction by a company called Konishi Mokei. They have been in the RC world in Japan for a long time. They revived the brand, hired back some of the original JR engineers and are producing the same exact stuff as before and new products under the JR DFA brand name. The electronics, helis and parts are produced in the same factories as before. There has been NO change.
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12-20-2019 05:59 AM  7 months ago
SoCal Scott

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Kailua, Hawaii

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Yes, DeeForce.net is the place to buy JR, now branded JR/DFA, products. I purchased an XG8+6 and a few DMSS receivers from them a couple months ago and have been very happy.
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